diff --git a/library/PCUIF_Types.ttcn b/library/PCUIF_Types.ttcn
index 1a4ba29..7bfaf9b 100644
--- a/library/PCUIF_Types.ttcn
+++ b/library/PCUIF_Types.ttcn
@@ -124,7 +124,7 @@
 	OCT1		spare,
 	OCT8		tsc,
 	uint32_t	hLayer1
-} with { variant "" };
+} with { variant (pdch_mask) "BITORDER(msb)" };
 
 type record PCUIF_info_ind {
 	uint32_t	version,